Some of you may already familiar (members of) this organization but I just came across them while searching for some info on older speakers. I went to their links page and IMO it is probably the most comprehensive-best organized links page related to A/V that I have come across in my short period involvement in the A/V hobby-field. You may want to check this page out.

Cliq on the links tab and then find whatever you are looking for.
I think you will be as amazed as I was.